问题 问答题 简答题

口腔粘膜色素痣的临床病理表现。

答案

参考答案:

口腔粘膜色素痣少见,可发生于任何年龄,多为单发,少数可累及两个以上的部位。病变大多数不超过0.5cm,高起或不高起粘膜表面,20%表现为无色素性。最常累及的部位是牙龈、腭,其次是颊、唇粘膜、牙槽嵴和唇红部。镜下根据痣细胞的部位可分为交界痣、粘膜内痣、复合痣。交界痣痣细胞局限于上皮结缔组织交界区。皮内痣或粘膜内痣痣细胞位于结缔组织内。复合痣痣细胞同时存在于上皮和结缔组织内。

阅读理解

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